[Issue 15523] extern(C++) support TLS (C++ 'thread_local') linkage?

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15523

--- Comment #8 from Manu <turkeyman at gmail.com> ---
(In reply to Manu from comment #7)
> (In reply to Jacob Carlborg from comment #6)
> >
> > This would only affect extern(C++)? Would it be confusing to need to specify
> > @attribute("__thread") only when the linkage is C++?
> 
> I don't really think so; __thread is a C++ attribute, so I think it only
> makes sense if you extern(C++) aswell.

Then again, __thread specifies only an ABI and no functions or mangling, so it
could theoretically apply to D variables just as readily as extern(C++).

thread_local only really makes sense for extern(C++) though, and that's what
I'm concerned with here.
I think it makes good sense that non-__gshared extern(C++) should follow the
standard, and I'm sure Apple will come to the party before too long.

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